Portion of a luminaire



FIG. 1 is a fragmentary bottom perspective view of a portion of a direct-indirect luminaire in accordance with our new design; and,

FIG. 2 is a bottom plan view thereof.

The broken lines are shown in FIGS. 1-4 for illustrative purposes only, and indicate the nature and use of our new design.

The fragmentary views of FIGS. 1-2 indicate indeterminate length and show the portion of the direct-indirect luminaire considered to be our new design. 

The ornamental design for a portion of a luminaire, as shown and described. 